/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: Administrator
 * Date: 2023-07-25
 * Time: 21:46
 */

class Counter {
    public int count = 0;
    private Object locker = new Object();

    public void increase() {
        synchronized (this) {
            count++;
        }
    }

    public void increase2() {
        count++;
    }
}
public class demo2 {
    public static void main(String[] args) throws InterruptedException {
        Counter counter = new Counter();

        Thread t1 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
                counter.increase();
            }
        });

        Thread t2 = new Thread(() -> {
            for (int i = 0; i < 50000; i++) {
                counter.increase();
            }
        });

        t1.start();
        t2.start();

        t1.join();
        t2.join();

        System.out.println(counter.count);
    }
}
